Sliding vane pump



7 March 1, 1949. c, DAWSON j 2,463,360

SLIDING VANEPUMP' I Filed Nov. 2, 1944 :s SheetS-Sheet 1,

INVENTOR.

ATTD R N EYE A I v v 7$"06f2673a 2/ 017 March 1, 1949. c, DAWSON $463,350

SLIDING VANE PUMP Filed Nov. 2, 1944 I E1 N ENf R. A iio'berf- .Dazmsari myzm aa 4 .ATruNEYs 3 Sheets-Sheet 2 Patented Mar. 1, 1949 SLIDING VANE PUIVIP Robert C, Dawson, Webster Springs, W. Va, assignor, by direct and mesne assignments, to Joseph .R. Byrne, Phoenixville, Pa.

Application November 2, 1944, Serial No. 561,573

1 Claim. 1

This invention appertains to improvements in rotary pumps generally, and more particularly to .a capsular type thereof.

One of the several objects and advantages of the invention is to provide a pump of this kind that embodies certain simplified and mechanically refined structural features, which admit of the manufacture of comparatively small units having large capacities and at a greatly reduced cost for labor and materials.

Another object of the invention has to do with the provision of a pump which involves a cylindrical rotor-piston eccentrically mounted within a cylindraceous casing and having a single blade slidable diametrically of the same and provided in its end edges with gils in gliding contact with the polar track of the casing, the motion of the blade being effected mechanically by the rotation of the rotor-piston relatively to a fixed bearing pin.

Yet another object of the invention lies in the provision of a pump as hereinbefore characterized and one that operates with a high degree of efficiency and smoothness, without involving any valve action or control, and which will readily pass sludge, without any stoppage of fluid flow through the casing by clogging.

With these and other objects and advantages in view, the invention resides in the certain new and useful combination, construction and arrangement of parts, as will be hereinafter more fully described, set forth in the appended claim, and illustrated in the accompanying drawings, in which:

Figure 1 is a rear end elevation of my improved p p;

Figure 2 is a vertical longitudinal section taken through the line 2-2 of Figure 1;

Figure 3 is a vertical transverse section taken through the line 33 of Figure 2, with the blade disposed at horizontal position;

Figure 4 is a sectional view similar to that of Figure 3, but showing the blade disposed at vertical position;

Figure 5 is a perspective view of the blade structure per se;

Figure 6 is an enlarged sectional detail of the spring tensioned blade packing;

Figure '7 is a cross section taken through the line 1-1 of Figure 6; and

Figure 8 is a view similar to Figure 3 of a slightly modified form of the pump.

Referring to the drawings, wherein like characters of reference denote corresponding parts in the several views, the embodiment of the invention, as it is exemplified therein, is comprised in a cylindraceous casing Ill, having an inlet l2 and .an outlet H. The ports 12 and M are located in opposite sides of the casing I0 near the base 16, and their ends are flanged, as at 22, for connection in on a fluid transmission line. The base it has ears 18 to adapt it to be bolted to a bedplate or the like. The rear side of the casing [-0 is closed by an end wall 24, that may be made integral therewith, as shown in Figure 2, while the front open side is closed by a removable cover plate 26, secured in place by machine screws 28.

The outer side of the front cover plate 26 is formed with a centrally disposed enlargement 30, of substantially frusto-conica'l form, inwardly through the center of which is threaded a bearing "pin '32, that has a tool engaging head 34 on its outer end and a look not 36 bearing against the outer face of the enlargement. The inner end of the bearing pin 32 free of threads to serve as axis or bearing pin 38, for sliding block 39.

The rear end wall 24, of the casing H3, is similarly enlarged of its outer side, as at '40, and this enlargement is located eccentrically with relation to the casing 10 and is formed with a centered inwardly opening bore 42 to receive a power driven shaft 44, which has its inner end threaded as at 4 6, in the hub 48 of a cylindrical rotor or piston 50 having a generally oblate recess 50' therein, the inner face of the end wall 24, of the casing l0, having a circular recess 54 to rotatably seat the end wall 52, of the rotor or piston. The hub 48 extends into the bore 42 which is eccentric to the axial center of the end wall 24 and a packing 56 is positioned within the bore about the shaft 44, between the hub end and a packing nut 58, engaged on the shaft and fitted into the outer end of the bore. The opposite, or front, end of the rotor or piston 50 is open and has its edge rotatively engaged in an annular recess 64, that is formed in the inner face of the front cover plate 26, which recess is arranged eccentrically of the bearing pin 38.

A blade 68 is carried by the rotor or piston 53 and is slidable in longitudinal slots 66 formed in the circumferential wall thereof, the blade thus dividing the interior of the casing Hi. The blade 68 halves the interior of easing In only when in vertical position, and at no other time, and it represents a chord subtending various arcs of the periphery of easing lo which always passes through the axial center of the rotor-piston 50. The end edges of the blade 63 are channelled, as at ill, to receive packing strips or gils 12, which have light bearing contact with the polar track 3 of the casing In, the strips or gils being tensioned outwardly of the channels by leaf springs 14 which are held against endwise displacement by pins 16. The forwardly directed edge of the blade 68 is cross-slotted in continuation with a guideway formed between U-shaped offsets 18, projecting from the opposite sides of the blade, at right angles thereto. The ofisets 18 facing the guideway being formed on the blade 68 so that the offsets are located within the generally oblate recess 50' in the rotor 50". Engaged in the guideway 19 is the elongated slide block 39, which is rotatably mounted at its center on the bearing pin 38. Thus, when the rotor or piston 50 is rotated by the power shaft 44, the block 39 turns on the bearing pin 38 and, for each quarter of a revolution thereof, the guide 18 and the blade 68 changes from the positions as shown in Figure 3 to those shown in Figure 4. During each succeeding half revolution of the parts, the blade 68 is reversed end for end and the block 39 moves from one end of the guide 19 to the other by reason of the generally oblate shape of the recess 50.

From this description, it will be readily apparent to those skilled in this particular art that, in the operation of the pump, the polar track of the ends of the blade 88 is positively formed and is independent of the polar track of the casing,

so that the blade is in no way subjected to centrifugal action and its ends run freely in the polar track of the casing, except for a very light contact of the gils or packing strips 12 therewith. Thus, friction losses and wear and tear on the polar track of the casing and blade ends is minimized, if not entirely eliminated. Also, in addition to the lubrication afforded the shaft 44 and the hub 48, of the rotor or piston 50, the working parts of the structure may be lubricated with equal facility by housing a quantity of lubricant within the rotor or piston, when it will be freely circulated about said parts during their operative motions. As shown in Figures 3 and 4, the outlet I4 is preferably made with a larger bore area than that of the inlet l2 and its bore has it bottom side upturned in the direction of the down flow of the fluid from the upper side of the rotorpiston 50, over which side the fluid is forced by the movement of the blade 88, the bottom wall l6 of the casing being inwardly thickened, as at 84, the inner side of which thickened portion 84 being curved in conformity with the curvature of the polar track of the casing.

That form of the pump shown in Figure 8 differs from the one shown in Figures 1 through 7, merely in that the inlet 12 and outlet 14* are located in the top of the casing 10*.

What I claim is: v

A rotor piston for a capsular pump comprising a cup-shaped rotor body, a hub on the rear of 'said body, a shaft removably mounted in said body, a generally oblate shaped recess in said body forming alternately thickened and slender walls, longitudinal slots formed in the thickened walls in opposed relation to each other, a blade slidably mounted in said slots, U-shaped guide arms extending at right angles from said blade centrally thereof, a guideway in said arms, a block slidable in said guideway, a bearing for said block, channels formed in the outer edges of said blade, packing strips in said channels, leaf springs in said channels rearwardly of said strips for the tensioning of said strips, pins secured to said springs centrally thereof and bores in the ends of said blade to receive said pins to retain said springs against endwise displacement within said channel.

ROBERT C. DAWSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 708,684 Wepplo Sept. 9, 1902 1,000,464 Vail Aug. 15, 1911 1,275,388 Christman Aug. 13, 1918 1,535,275 Westin Apr. 28, 1925 1,857,931 Axien May 10, 1932 FOREIGN PATENTS Number Country Date 2,805 Great Britain of 1862 4,409 Great Britain Apr. 9, 1885 9,429 France Sept. 22, 1838 126,731 Switzerland July 2, 1928 278,972 Italy Oct. 25, 1930 280,606 Italy Dec. 15, 1930 

